The MPD is the source document for the initial maintenance program. The Maintenance Planning Document (MPD) contains all the Maintenance Review Board (MRB) requirements, as contained in the Maintenance Review Board Report (MRBR) together with all additional mandatory scheduled maintenance requirements.

Whilst the MPD is the document required for the initial aircraft operator’s maintenance program it is by no means mandatory to comply in every case with subsequent changes to the MRBR.

In fact following the accumulation of reliability data it is quite possible for the Maintenance Program tasks to be escalated beyond the initial periodicity. Savvy Operators will use reliability data and other indicators to develop more effective planning processes which may very well include task escalation.